Business news from Yahoo

Two major market events that have the potential to send U.S. equity volumes sky-high will collide Friday. The first is the quarterly event known as “quadruple witching” -- when futures and options on indexes and individual stocks expire. The anticipated spike in turbulence will hit a market already roiled by rising trade tensions between the U.S. and China.

Listings for an Amazon Echo Sub subwoofer and an Amazon Smart Plug were leaked ahead of a company event on Thursday. The subwoofer is designed to work with Amazon's Echo speakers, which would also get stereo sound functionality, according to the leaked listings on Amazon UK first spotted by the website Pocket-lint. The Amazon Smart Plug would give basic Alexa functionality to devices plugged into it.

Anheuser-Busch and other beverage makers donated cans of drinking water to victims of Hurricane Florence. Early estimates show that Hurricane Florence has left a $22 billion path of devastation in its wake, with $2.5 billion in insured losses so far. Hundreds of thousands of people are still without power in North Carolina, and flooding remains at dangerous levels.

New U.S. liquefied natural gas terminals with enough capacity to double U.S. exports have either begun commissioning their facilities or are waiting for approval from the energy regulator, a review of their documents showed this week. Although long planned, the actual commissioning of plants has been a moving target in the past. It also opens the taps for large volumes to hit the spot market before long-term commercial contracts are formerly triggered.